Concessional and Non-Concessional Contributions
Super contributions in Australia fall into two broad groups. Concessional contributions are paid before tax — this includes your employer's Superannuation Guarantee (SG) payments and any salary sacrifice amounts you arrange. They are taxed at 15% inside the fund, which is typically lower than your marginal income tax rate.
Non-concessional contributions come from after-tax money you choose to put in yourself — for example, a lump sum from savings. These are not taxed again inside the fund because you have already paid income tax on the money.
Both types have annual caps. Exceeding either cap triggers additional tax charges. The ATO publishes the current caps each financial year — always check the official source rather than relying on a figure you read elsewhere, including here.
The Employer Superannuation Guarantee
Your employer is required by law to pay a percentage of your ordinary time earnings into a complying super fund. This rate has been increasing incrementally and is legislated to continue rising. The SG amount counts toward your concessional contributions cap. If you also salary sacrifice, both amounts combined must sit under the cap.
The Catch-Up Carry-Forward Rule
If your total super balance is below a set threshold, you may be able to use unused concessional contribution cap space from previous financial years. This is called the carry-forward rule and can be useful if you have had time out of the workforce, worked part-time, or had periods of lower income. The unused amounts accumulate for up to five years. Check the ATO website for current eligibility thresholds.